1, look at the color
The color of pure teapot can be divided into purple, yellow and light red (including the color in the middle of the two colors), which is characterized by moist feeling, matt color and light weight like baby skin.
2. Listen to the sound
The sound is crisp when there is no pot. After raising it, the sound becomes sand, dumb, deep and heavy, completely the sound of pottery.
Step 3 look at the surface
After the pure teapot is raised, the surface of the teapot seems to have a feeling of oil, and the more it is rubbed, the more moist it becomes. Remember that the surface of the teapot should be kept clean, and there should be no tea stains on the surface, which will cover up the beauty of the teapot.
4, the appearance is breathable
The teapot can keep the tea fresh, not bad for three or five days in summer, and still keep the fragrance of the original tea.
Extended data:
Zisha mineral is located in Huanglong Mountain, Dingshu Town, Yixing City, Jiangsu Province. Its metallogenic age is Paleozoic Devonian system, about 350 million years ago. Located in the Sanya zone of sea, land and lake on the edge of Jiangnan ancient land. Sedimentary clay shale is formed by some fine clay particles and other minerals under the action of wind or water.
Yingshi, clay, hydromica and hematite are the main components of purple clay in Yixing, Jiangsu. The finished purple sand products made from them have good plasticity, high green strength, low shrinkage during drying and sintering, and become world-famous ceramics.
This kind of natural clay mineral is very rare in ceramic producing areas. Although there are similar clay in some parts of China, such as Guangxi, Shanxi, Henan, Hebei, Shaanxi, Anhui and other provinces, there are some similarities at first glance, but its glass is heavy and there are many limitations in technology, which can not be compared with Yixing purple sand.